books.google.com - Van Gennep was the first observer of human behaviour to note that the ritual ceremonies that accompany the landmarks of human life differ only in detail from one culture to another, and that they are in essence universal. Originally published in English in 1960. This edition reprints the paperback edition...http://books.google.com/books/about/The_Rites_of_Passage.html?id=kJpkBH7mB7oC&q=clan&utm_source=gb-gplus-shareThe Rites of Passage